package com.example.shrio.conf;

import java.util.ArrayList;
import java.util.Collection;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
import org.apache.shiro.realm.Realm;

/**
 * 自定义认证工厂
 * 
 * @author wangkai
 *
 * @date: 2019年6月14日 下午4:43:44
 */
public class CustomizedModularRealmAuthenticator extends ModularRealmAuthenticator {

	@Override
	protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken)
			throws AuthenticationException {

		// 判断getRealms()是否返回为空
		assertRealmsConfigured();
		// 强制转换回自定义的CustomizedToken
		CustomizedToken customizedToken = (CustomizedToken) authenticationToken;
		// 登录类型
		String loginType = customizedToken.getLoginType();
		// 所有Realm
		Collection<Realm> realms = getRealms();
		// 登录类型对应的所有Realm
		Collection<Realm> typeRealms = new ArrayList<>();
		for (Realm realm : realms) {
			System.out.println(realm.getName());
			if (realm.getName().contains(loginType))
				typeRealms.add(realm);
		}
		// 判断是单Realm还是多Realm
		if (typeRealms.size() == 1)
			return doSingleRealmAuthentication(typeRealms.iterator().next(), customizedToken);
		else
			return doMultiRealmAuthentication(typeRealms, customizedToken);
	}

}
